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DOI | 10.1002/joc.6356 |
Intra-seasonal characteristics of wintertime extreme cold events over South Korea | |
Park, Tae-Won1; Hong, Jin Gi2; Park, Doo-Sun R.3 | |
2019-10-31 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY |
ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | South Korea; USA |
英文摘要 | In this study, the characteristics of extreme cold events over South Korea in the boreal winter (November to March) are investigated in terms of month-to-month variations of frequency, duration, amplitude, and atmospheric circulation pattern. To explain the mechanism for these month-to-month variations, all extreme cold events are classified into three types based on an agglomerative hierarchical clustering method, and their linkages with large-scale variabilities, such as the Siberian High (SH), the Arctic Oscillation (AO), and the Madden-Julian Oscillation (MJO), are analysed. "Wave-train" type does not tend to occur under the typical favourable conditions for the East Asian cold extremes, e.g., strong SH intensity, strong negative AO phase, and MJO phases 2-3, hence resulting in weak and short events. On the other hand, strong and long-lasting "Ural blocking" and "subarctic blocking" types are accompanied with the aforementioned favourable large-scale conditions. Thus, November and March with the most frequent occurrences of the wave-train type are the months in which extreme cold events have weaker amplitude and shorter duration than other months. Compared with the wave-train type, the Ural blocking type occur frequently in January and February, while occurrences of the subarctic blocking type are concentrated in December and January. It contributes to relatively powerful and sustained extreme cold events in mid-winter (from December to February). In particular, extreme cold events during March have the lowest frequency, weakest amplitude, and shortest duration due to a lack of strong SH activity, strong negative AO phase, and MJO phases 2-3, but strong activities of these factors in January force the most frequent, strongest, and longest extreme cold events in the boreal winter. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000493466800001 |
WOS关键词 | INTRASEASONAL AMPLIFICATION ; TEMPERATURE ANOMALIES ; INTERANNUAL VARIATION ; ARCTIC OSCILLATION ; CLIMATE EXTREMES ; EAST-ASIA ; PART I ; SURGE ; BLOCKING ; CIRCULATION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/187859 |
专题 | 气候变化 |
作者单位 | 1.Chonnam Natl Univ, Dept Earth Sci Educ, Gwangju, South Korea; 2.Calif State Univ Long Beach, Dept Civil Engn & Construct Engn Management, Long Beach, CA 90840 USA; 3.Chosun Univ, Dept Earth Sci, Gwangju, South Korea |
推荐引用方式 GB/T 7714 | Park, Tae-Won,Hong, Jin Gi,Park, Doo-Sun R.. Intra-seasonal characteristics of wintertime extreme cold events over South Korea[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2019. |
APA | Park, Tae-Won,Hong, Jin Gi,&Park, Doo-Sun R..(2019).Intra-seasonal characteristics of wintertime extreme cold events over South Korea.INTERNATIONAL JOURNAL OF CLIMATOLOGY. |
MLA | Park, Tae-Won,et al."Intra-seasonal characteristics of wintertime extreme cold events over South Korea".INTERNATIONAL JOURNAL OF CLIMATOLOGY (2019). |
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